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Finding the Fourth Proportional to 263.60, 395.28 and 90.23

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Solution

The fourth proportional to 263.60, 395.28 and 90.23 is: 135.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    263.60 : 395.28 = 90.23 : x
  2. Step 2: Convert to fraction form
    263.60/395.28 = 90.23/x
  3. Step 3: Cross multiply
    263.60x = 395.28 × 90.23
  4. Step 4: Simplify right side
    263.60x = 35,666.11
  5. Step 5: Solve for x
    x = 35,666.11/263.60
  6. Step 6: Final answer
    x = 135.31

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.